Merck Animal Health Receives Positive CVMP Opinion for BOVILIS CRYPTIUM®

First cattle maternal vaccine effectively proven to protect against Cryptosporidium parvum in calves from birth onwards

RAHWAY, N.J.,– Oct. 5, 2023 – Merck Animal Health, known as MSD Animal Health outside  of the United States and Canada, a division of Merck & Co., Inc., Rahway, N.J., USA (NYSE:MRK), today announced the European Medicines Agency’s Committee for Veterinary Medicinal Products (CVMP) issued a positive opinion for BOVILIS CRYPTIUM®, a vaccine to protect cattle against Cryptosporidium parvum (C. parvum) infection.

BOVILIS CRYPTIUM is indicated for the active immunization of pregnant cows to raise antibodies in colostrum against gp40 of C. parvum.  BOVILIS CRYPTIUM is the first C. parvum maternal vaccine for cattle. C. parvum is a highly infectious zoonotic parasite that causes cryptosporidiosis, one of the most significant gastrointestinal diseases in cattle.

C. parvum is a relentlessly challenging pathogen for cattle producers across Europe and worldwide. It is highly contagious and fast-spreading, and its contamination can be unavoidable in environments where cattle, goats and sheep live,” said Philippe Houffschmitt, DVM, MBA, associate vice president of the global ruminant business at Merck Animal Health. “We are pleased the CVMP recognizes the vaccine’s capability to help solve such a significant problem. We look forward to working with European regulators to potentially expand the preventive neonatal vaccine market with this new therapeutic category.”

Vaccinating pregnant heifers and cows can provide protection for calves at birth – when they are most vulnerable. The parasite plays a major role in the development of calf scour, the most common cause of death in young calves,i and can have longer term effects on weight gain and production efficiency in severe cases.ii  

The efficacy of BOVILIS CRYPTIUM was previously established in various field studies which showed that the therapy elicits a strong immune response against C. parvum in newborn calves fed with colostrum from vaccinated pregnant heifers or cows, significantly reducing clinical signs (i.e. diarrhea) caused by C. parvum

About Merck Health

At Merck, known as MSD outside of the United States and Canada, we are unified around our purpose: We use the power of leading-edge science to save and improve lives around the world. For more than a century, we’ve been at the forefront of research, bringing forward medicines, vaccines and innovative health solutions for the world’s most challenging diseases. Merck Animal Health, a division of Merck & Co., Inc., Rahway, N.J., USA, is the global animal health business of Merck. Through its commitment to The Science of Healthier Animals®, Merck Animal Health offers veterinarians, farmers, producers, pet owners and governments one of the widest ranges of veterinary pharmaceuticals, vaccines and health management solutions and services as well as an extensive suite of connected technology that includes identification, traceability and monitoring products. Merck Animal Health is dedicated to preserving and improving the health, well-being and performance of animals and the people who care for them. It invests extensively in dynamic and comprehensive R&D resources and a modern, global supply chain. Merck Animal Health is present in more than 50 countries, while its products are available in some 150 markets. For more information, visit and connect with us on LinkedIn, Facebook, Twitter and Instagram.

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[1] Cho Y, Yoon, K. An overview of calf diarrhea – infectious etiology, diagnosis, and intervention. J Vet Sci. 2014 Mar;15(1):1-17.

[2] Shaw HJ, Innes EA, Morrison LJ, et al. Long-term production effects of clinical cryptosporidiosis in neonatal calves. Int J Parasitol. 2020 May;50(5):371-376.